models.py 文件源码

def validate_folder(self):
        """Validates whether a folder can be created.
        Performs two types of validation:
        1. Checks if a DB entry is present.
        2. Checks if a physical folder exists in the system."""

        unicoded_title = "".join((i if ord(i) < 128 else '_') for i in unidecode(self.title))
        parent_folder = self.folder

        if parent_folder:
            if ImageFolder.objects.filter(folder=parent_folder, title=self.title).count() > 0:
                raise ValidationError("Folder exists in the DB!", code='db')
            folder_path = os.path.join(settings.MEDIA_ROOT, parent_folder.path, unicoded_title)
            if os.path.isdir(folder_path):
                raise ValidationError("Folder exists in the OS!", code='os')
        else:
            if ImageFolder.objects.filter(folder__isnull=True, title=self.title).count() > 0:
                raise ValidationError("Folder exists in the DB!", code='db')
            folder_path = os.path.join(settings.MEDIA_ROOT, IMAGES_FOLDER_NAME, unicoded_title)
            if os.path.isdir(folder_path):
                raise ValidationError("Folder exists in the OS!", code='os')